Mini keyboard for Z80

Depending on the application of the
'Multifunction 280 card', a
basic set of switches to control the program
flow may be required. Also, in
some cases, the PC/XT keyboard that
can be connected to the card may prove
a little too bulky to be carried around.
The keyboard plus LED tndication described
here is connected to PIOA on the
multi-functton 280 card. The 10 keys
are arranged horizontally on a board fitted behind the enclosure
front panel, and serve to control
functions determined by the user
software.

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